Phononic thermal Hall effect in diluted terbium oxides

Yuji Hirokane, Yoichi Nii, Yasuhide Tomioka, Yoshinori Onose

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We observe thermal Hall conductivity for (Tb0.3Y0.7)2Ti2O7, which is even larger than the previously observed thermal Hall conductivity for Tb2Ti2O7 [Science 348, 106 (2015)10.1126/science.1257340]. The robustness against the dilution of the Tb magnetic moment indicates the Hall effect of phonons is the origin of thermal Hall conductivity in Tb pyrochlore oxide. The temperature and magnetic field dependences are observed to follow the empirical relation that the Hall angle is proportional to the magnetization. We also investigate thermal Hall conductivity for (Tb0.3Y0.7)3Ga5O12. We observe barely finite thermal conductivity at low temperatures. This confirms the thermal Hall conductivity in Tb-garnet oxide. The origins of the empirical relation in the pyrochlore system and the magnitude difference between the two systems are discussed comparatively with previously proposed theories of the phonon Hall effect.

Original languageEnglish
Article number134419
JournalPhysical Review B
Volume99
Issue number13
DOIs
Publication statusPublished - 2019 Apr 11

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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